root of -x²+3x+12= 0
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Answer:
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Answered by
0
Answer:
3x-12 = 0
Isolate
√3x = 12+0
Tidy up
√3x = 12
STEP
2
:
Eliminate the radical on the left hand side
Raise both sides to the second power
(√3x)2 = (12)2
After squaring
3x = 144
STEP
3
:
Solve the linear equation
Rearranged equation
3x -144 = 0
Add 144 to both sides
3x = 144
Divide both sides by 3
A possible solution is :
x = 48
STEP
4
:
Check that the solution is correct
Original equation, root isolated, after tidy up
√3x = 12
Plug in 48 for x
√3•(48) = 12
Simplify
√144 = 12
Solution checks !!
Solution is:
x = 48
One solution was found :
x = 48
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